3.js

const cardNumber = "4533787178994213";
const last4Digits = cardNumber.slice(-4);

// The last4Digits variable should store the last 4 digits of cardNumber
// However, the code isn't working
// Before running the code, make and explain a prediction about why the code won't work
// Then run the code and see what error it gives.
// Consider: Why does it give this error? Is this what I predicted? If not, what's different?
// Then try updating the expression last4Digits is assigned to, in order to get the correct value
/* the code is not working because of the variable type which is .slice method work on 
string and array variable types not on number variable types to fix it we can change the variable type to 
string variable type by adding double quotation marks to the variable.*/